A 10.00g sample of a soluble barium salt is treated with an excess of sodium sulphate to precipitate 11.21 g `BaSO_(4)` (M = 233.4). Which barium salt is it?
A. `BaCl_(2)` (M = 208.2)
B. `Ba(O_(2)CH)_(2)` (M = 227.3)
C. `Ba(O_(2)CH)_(2)` (M = 261.3)
D. `BaBr_(2)` (M = 297.1)